Photographic developing apparatus.



No. 777,701. A PATENTED DEC. 20, 1904. W. THOMAS. A PHOTOG'RAPHIGDEVELOPING APPARATUS.

APPLIOATION FILED JULY 2. 1903.

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way-:rucsscs F-NTOR 7mm 7 w m M M W a UNITED STATES Patented December20, 1904.

WVILLIAM THOMAS, OF GERALDINE, NEIV ZEALAND.

PHOTOGRAPHIC DEVELOPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 777,701, dated December20, 1904.

Application filed July 2, 1903. Serial No. 164,061.

that may be easily carried with a camera and by means of which plates orfilms may be developed in day or artificial light without having accessto a dark room. For the purpose of transferring the plates from a'camerato the developer any portable changing bag or frame may be employed.Once the lid of the developer is put on the plate or film may bedeveloped in actinic light.

In order that the invention may be thoroughly understood, reference ismade to the accompanying drawings, in which- Figure 1 shows inperspective the developing-box for plates, and Fig. 2 is a plan frombelow of the inside of the lid portion, while Fig. 3 is a view of thedish.

In the figures, e is the dish, and f a nonactinic plate in the floor ofsame. Closely fitting over eis the lid g, that is likewise provided witha non-actinie' plate 7L and a hinged lid /L/ for closingoversame toprevent fogging of the negative. Upon the outside of g are funnels y'that screw into or are otherwise respectively attached to tubes 76within lid 9. Said tubes have discharge-orifices Z Z, andv adischarge-tube m is for the purpose of discharging the liquid contentsof the box that have been inroduced thereto through said funnels andtubes.

In the treatment of plate-negatives I provide two dishes to each lid,and I form my dish as shown in Fig. 3. A slot 72- is made in the side ofthe dish, and ledges 0 0 are formed within the same. When the plate hasbeen treated, the dish may be detached from the lid and an opaque coverof any material inserted in slot 7, so as to rest upon the ledges 0 0while the plate in the dish will be fixing.

In operation photographic plates are placed within the box a and lid gsecurely placed over the same and a suflicient quantity of the developerliquid poured through the funnel 7'. The liquid on leaving the funneltraverses tube Z: and empties through orifice Z. The plate or film isthen treated in the ordinary way, and the operator will be enabled togage when the negative is done by holding the box up to or over a light,when by virtue of the transparent plates in each side of the box he willbe able to see right through it, and consequently through the negative.If the solution requires adjustment, it can instantly be done bystrengthening or weakening it through either funnel, and when done withthe dish a may be washed out by delivering water through either funneland decanting it through the tube m, the outer end of which is elevatedso that a continuous stream of water can flow through the box to washthe plate. The plate is fixed by introducing the fixer chemical throughthe funnel pipe 71/, and orifice Z, and the negative will have gonethrough the process of development without it being necessary for theoperator to touch it.

In the treatment of ribbon-films it will be observed that eachfilm-picture can, if desired, be treated scrz'azfim. In treating suchfilm-pictures individually it will be possible to develop each accordingto circumstances. When a number of films are treated in a closed box,some will be underdone and others will be overdone, according to thelight variations at the time the pictures were obtained; but with myinvention it is unnecessary that a given actinometer-measured exposurebe taken, as the requirements of each picture can be ascertained whileit is undergoing development in my box and the treatment regulatedaccordingly.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an apparatus for developing sensitive photographic surfaces, adish having a nonactinic plate in its fioor, a lid having a similarplate therein adapted to fit over the dish, tubes secured to the underside of the lid and extending from end to end thereof, and havingdelivery-orifices at one end thereof, funnels secured to the lid andconnected with the other ends of the tubes so as to prevent the entranceof light, and adischarge-pipe having providing means for introducing anopaque its outer end elevated. plate and for supporting the same, as andfor 2. 1n apparatus for developing photothe purposes specified. graphicplates and films apart from a dark In testimony whereof I have signedthis 5 5 room, a dish having a non-actinic plate in its specification inthe presence of two subscribfloor and a lid adapted to fit over the dishto ing witnesses. form an actinic light-proof box, means in the r 1 lidfor introducing liquid reagents to the dish TILLIAM lHOMAb' which dishis furnished with a longitudinal \Vitnesses: IO slit in its side and aninwardly-turned strip P. M. NEWTON, of metal lengthwise of the dish, thewhole M. E. EYES.

